<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			span{
			height:5em;
			width: 5em;
			background-color: cornflowerblue;
			display:inline-block;}
			span:nth-child(2n+3){
				background-color:burlywood ;
				border-radius:50%;
			}
		</style>
	</head>
	<body>
			<span></span>
		<span></span>
		<span></span>
		<span></span>
		<span></span>
		<span></span>
		<span></span>
		<span></span>
		<span></span>
		<span></span>

		
	</body>
</html>
